This is the Traxxas Complete Stock Replacement Carburetor for the Traxxas TRX 2.5 and TRX 3.3 Engines. A damaged carburetor will severely decrease the power of your engine. This can restore the lost power. The TRX 2.5 and 3.3 engines are used on nearly all Traxxas vehicles, including the T-Maxx 2.5 and 3.3, Revo 2.5 and 3.3, Jato 2.5 and 3.3, Slayer Pro, Nitro 4-Tec, Nitro Rustler, and Nitro Slash.